This paper presents the use of a digital holographic vibrometer to investigate metal-polymer laminates by non-destructive testing. A polymer strip was glued to a metal one of the same size. Connection defects could be detected by a local change of the vibration amplitude, even when hidden from view for the observer. The amplitudes of the oscillations excited in the samples were up to 40 nm. This method proved to be non-destructive, allowing the samples to be (re)used after testing, or being studied with other test methods.

中文翻译：

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使用数字全息测振仪对金属-聚合物层压板进行无损检测

本文介绍了使用数字全息测振仪通过无损检测来研究金属-聚合物层压板。将聚合物条粘在相同尺寸的金属上。即使在观察者看不见的情况下，也可以通过振动幅度的局部变化来检测连接缺陷。样品中激发的振荡幅度高达 40 nm。这种方法被证明是非破坏性的，允许样品在测试后（重新）使用，或用其他测试方法进行研究。